C Etymology

The boolean operators.  AKA logical operators, are used to perform boolean Boolean OR, Boolean AND, and Boolean NOT operations.  Boolean values are typically used to control iterations or selections.  In C.  there is no Boolean type; int values are commonly used as Boolean, with 0 representing false, and any non-zero value representing true.

boolean-and-operator

&&: int × int &rarr int

boolean-or-operator

||: int × int &rarr int

boolean-not-operator

!: int &rarr int

boolean-or-operator

The Boolean OR operator has its usual mathematical meaning, but short circuit evaluation is used.

boolean-and-operator

The Boolean AND operator has its usual mathematical meaning, but short circuit evaluation is used.

boolean-not-operator

The Boolean NOT operator has its usual mathematical meaning.

boolean-operator

Boolean operators have no side effects.

boolean-or-operator

Tha Boolean || (OR) operator is not semantically commutative.

Tha Boolean OR operator is mathematically commutative.

boolean-and-operator

Tha Boolean && (AND) operator is not semantically commutative.

Tha Boolean AND operator is mathematically commutative.

boolean-operator

The boolean operators associate left to right syntactically.

boolean-or-operator

The Boolean OR operator is mathematically associative.

boolean-and-operator

The Boolean AND operator is mathematically associative.

• Other documentation may refer to Boolean operators as logical operators.
• The int value 0 is interpreted as false; any non zero value is .interpreted as true.
• The result of a Boolean operation is either 0 (false) or 1 (true).